Abdomen, Acute

• University of California, Davis Medical Center — Sacramento, California, United States
• University of Colorado, Anschutz Medical Center and Children's Hospital Colorado — Aurora, Colorado, United States
• Emory University Children's Healthcare of Atlanta — Atlanta, Georgia, United States
• Cincinnati Children's Hospital Medical Center — Cincinnati, Ohio, United States

• Karolinska University Hospital — Stockholm, Sweden

• Alberta Children's Hospital Emergency Department — Calgary, Alberta, Canada

• All Scottish NHS Hospitals — Multiple Locations, United Kingdom

• Copenhagen University Hospital - North Zealand — Hillerød, Denmark

• Copenhagen University Hospital - North Zealand — Hillerød, Denmark

• Zagazig University Hospitals — Zagazig, Sharqua, Egypt

• Brooke Army Medical Center — San Antonio, Texas, United States

Not specified

• London Health Sciences Centre — London, Ontario, Canada